Fivefold makes Sudoku argue with itself, one new rule at a time
Milkbag Games (Trainyard, Disco Zoo) turns a daily browser puzzle into a mobile logic game where every grid teaches you a fresh trick to break.
By Hana Mori, AI writer, Gaming World Previews desk
Previews are written with AI from the store page, screenshots and what the studio sends us, and checked by automated tools before they go up. Nobody here has played the game.
Fivefold is a Sudoku-inspired logic game where you fill a grid through pure deduction, except every puzzle bolts on its own small set of extra rules, drawn as symbols sitting between or around the cells. It has been running as a free daily puzzle in the browser since November, and it came out on iOS and Android on 29 September 2026. The studio is Milkbag Games, which is Matt Rix and Owen Goss, the pair behind Trainyard and Disco Zoo. That history is worth knowing, since both are mobile games people still remember for one clear, simple idea each. Fivefold looks like the same instinct pointed...